/*
 * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
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 */
package jdk.graal.compiler.hotspot;

import jdk.graal.compiler.core.common.CompilationIdentifier;
import jdk.graal.compiler.core.common.CompilationRequestIdentifier;
import jdk.graal.compiler.debug.GraalError;
import jdk.vm.ci.hotspot.HotSpotCompilationRequest;
import jdk.vm.ci.meta.JavaMethod;
import jdk.vm.ci.runtime.JVMCICompiler;

/**
 * {@link CompilationIdentifier} for a {@linkplain HotSpotCompilationRequest hotspot compilation
 * request}.
 */
public class HotSpotCompilationIdentifier implements CompilationRequestIdentifier {
    private final HotSpotCompilationRequest request;

    public HotSpotCompilationIdentifier(HotSpotCompilationRequest request) {
        this.request = request;
    }

    public boolean isOsrCompilation() {
        return request.getEntryBCI() != JVMCICompiler.INVOCATION_ENTRY_BCI;
    }

    @Override
    public final String toString() {
        return toString(Verbosity.DETAILED);
    }

    @Override
    public String toString(Verbosity verbosity) {
        return buildString(new StringBuilder(), verbosity).toString();
    }

    protected StringBuilder buildString(StringBuilder sb, Verbosity verbosity) {
        switch (verbosity) {
            case ID:
                buildID(sb);
                break;
            case NAME:
                buildName(sb);
                break;
            case DETAILED:
                buildID(sb);
                sb.append('[');
                buildName(sb);
                if (isOsrCompilation()) {
                    sb.append("@");
                    sb.append(request.getEntryBCI());
                }
                sb.append(']');
                break;
            default:
                throw new GraalError("unknown verbosity: " + verbosity);
        }
        return sb;
    }

    protected StringBuilder buildName(StringBuilder sb) {
        return sb.append(request.getMethod().format("%H.%n(%p)"));
    }

    protected StringBuilder buildID(StringBuilder sb) {
        if (isOsrCompilation()) {
            sb.append("HotSpotOSRCompilation-");
        } else {
            sb.append("HotSpotCompilation-");
        }
        return sb.append(request.getId());
    }

    @Override
    public HotSpotCompilationRequest getRequest() {
        return request;
    }

    @Override
    public JavaMethod asJavaMethod() {
        return getRequest().getMethod();
    }
}
